using System;
using System.Text;

/*
 * $Id: PdfIndirectReference.cs 106 2009-12-07 12:23:50Z psoares33 $
 * 
 *
 * This file is part of the iText project.
 * Copyright (c) 1998-2009 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

namespace iTextSharp.text.pdf {

    /**
     * <CODE>PdfIndirectReference</CODE> contains a reference to a <CODE>PdfIndirectObject</CODE>.
     * <P>
     * Any object used as an element of an array or as a value in a dictionary may be specified
     * by either a direct object of an indirect reference. An <I>indirect reference</I> is a reference
     * to an indirect object, and consists of the indirect object's object number, generation number
     * and the <B>R</B> keyword.<BR>
     * This object is described in the 'Portable Document Format Reference Manual version 1.3'
     * section 4.11 (page 54).
     *
     * @see        PdfObject
     * @see        PdfIndirectObject
     */

    public class PdfIndirectReference : PdfObject {
    
        // membervariables
    
        /** the object number */
        protected int number;
    
        /** the generation number */
        protected int generation = 0;
    
        // constructors
    
        protected PdfIndirectReference() : base(0) {
        }
        
        /**
         * Constructs a <CODE>PdfIndirectReference</CODE>.
         *
         * @param        type            the type of the <CODE>PdfObject</CODE> that is referenced to
         * @param        number            the object number.
         * @param        generation        the generation number.
         */
    
        internal PdfIndirectReference(int type, int number, int generation) : base(0, new StringBuilder().Append(number).Append(' ').Append(generation).Append(" R").ToString()) {
            this.number = number;
            this.generation = generation;
        }
    
        /**
         * Constructs a <CODE>PdfIndirectReference</CODE>.
         *
         * @param        type            the type of the <CODE>PdfObject</CODE> that is referenced to
         * @param        number            the object number.
         */
    
        internal PdfIndirectReference(int type, int number) : this(type, number, 0) {}
    
        // methods
    
        /**
         * Returns the number of the object.
         *
         * @return        a number.
         */
    
        public int Number {
            get {
                return number;
            }
        }
    
        /**
         * Returns the generation of the object.
         *
         * @return        a number.
         */
    
        public int Generation {
            get {
                return generation;
            }
        }

        public override String ToString() {
    	    return new StringBuilder().Append(number).Append(' ').Append(generation).Append(" R").ToString();
        }
    }
}
